package com.domo.springcloud.controller;

import com.domo.springcloud.entities.CommonResult;
import com.domo.springcloud.entities.Payment;
import com.domo.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {

    public static final String PAYMENT_UEL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
       return restTemplate.postForObject(PAYMENT_UEL + "/payment/create" ,payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/create2")
    public CommonResult<Payment> create2(Payment payment){
        ResponseEntity<CommonResult> entity = restTemplate.postForEntity(PAYMENT_UEL + "/payment/create" , payment, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()){
            log.info("create2 ：" + entity.getStatusCode() + "\t " + entity.getHeaders());
            return entity.getBody();
        }else{
            return new CommonResult<>(500,"操作失败");
        }
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_UEL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_UEL + "/payment/get/" + id,CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()){
            log.info(entity.getStatusCode() + "\t " + entity.getHeaders());
            return entity.getBody();
        }else{
            return new CommonResult<Payment>(500,"操作失败");
        }
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if(instances == null || instances.size() <= 0){
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instances(instances);

        URI uri = serviceInstance.getUri();

        return restTemplate.getForObject(uri + "/payment/lb",String.class);

    }

}
